本文整理汇总了Python中qgis.core.QgsProperty类的典型用法代码示例。如果您正苦于以下问题:Python QgsProperty类的具体用法?Python QgsProperty怎么用?Python QgsProperty使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了QgsProperty类的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testRenderLineLayerDataDefined
def testRenderLineLayerDataDefined(self):
""" test that rendering a line symbol with data defined enabled layer works"""
lines_shp = os.path.join(TEST_DATA_DIR, 'lines.shp')
lines_layer = QgsVectorLayer(lines_shp, 'Lines', 'ogr')
QgsProject.instance().addMapLayer(lines_layer)
layer = QgsSimpleLineSymbolLayer()
layer.setDataDefinedProperty(QgsSymbolLayer.PropertyLayerEnabled, QgsProperty.fromExpression("Name='Highway'"))
layer.setColor(QColor(100, 150, 150))
layer.setWidth(5)
symbol = QgsLineSymbol()
symbol.changeSymbolLayer(0, layer)
lines_layer.setRenderer(QgsSingleSymbolRenderer(symbol))
ms = QgsMapSettings()
ms.setOutputSize(QSize(400, 400))
ms.setOutputDpi(96)
ms.setExtent(QgsRectangle(-133, 22, -70, 52))
ms.setLayers([lines_layer])
renderchecker = QgsMultiRenderChecker()
renderchecker.setMapSettings(ms)
renderchecker.setControlPathPrefix('symbol_layer')
renderchecker.setControlName('expected_linelayer_ddenabled')
self.assertTrue(renderchecker.runTest('linelayer_ddenabled'))
QgsProject.instance().removeMapLayer(lines_layer)
示例2: testPartNum
def testPartNum(self):
# test geometry_part_num variable
s = QgsLineSymbol()
s.deleteSymbolLayer(0)
sym_layer = QgsGeometryGeneratorSymbolLayer.create({'geometryModifier': 'segments_to_lines($geometry)'})
sym_layer.setSymbolType(QgsSymbol.Line)
s.appendSymbolLayer(sym_layer)
marker_line = QgsMarkerLineSymbolLayer(False)
marker_line.setPlacement(QgsMarkerLineSymbolLayer.FirstVertex)
f = QgsFontUtils.getStandardTestFont('Bold', 24)
marker = QgsFontMarkerSymbolLayer(f.family(), 'x', 24, QColor(255, 255, 0))
marker.setDataDefinedProperty(QgsSymbolLayer.PropertyCharacter, QgsProperty.fromExpression('@geometry_part_num'))
marker_symbol = QgsMarkerSymbol()
marker_symbol.changeSymbolLayer(0, marker)
marker_line.setSubSymbol(marker_symbol)
marker_line.setAverageAngleLength(0)
line_symbol = QgsLineSymbol()
line_symbol.changeSymbolLayer(0, marker_line)
sym_layer.setSubSymbol(line_symbol)
# rendering test
g = QgsGeometry.fromWkt('LineString(0 0, 10 0, 10 10, 0 10)')
rendered_image = self.renderGeometry(s, g, buffer=4)
assert self.imageCheck('part_num_variable', 'part_num_variable', rendered_image)
marker.setDataDefinedProperty(QgsSymbolLayer.PropertyCharacter,
QgsProperty.fromExpression('@geometry_part_count'))
# rendering test
g = QgsGeometry.fromWkt('LineString(0 0, 10 0, 10 10, 0 10)')
rendered_image = self.renderGeometry(s, g, buffer=4)
assert self.imageCheck('part_count_variable', 'part_count_variable', rendered_image)
示例3: test_property
def test_property(self):
"""
Test that QgsProperty values are correctly loaded and written
"""
doc = QDomDocument("properties")
prop = QgsProperty.fromValue(1001)
elem = QgsXmlUtils.writeVariant(prop, doc)
prop2 = QgsXmlUtils.readVariant(elem)
self.assertEqual(prop, prop2)
prop = QgsProperty.fromExpression('1+2=5')
elem = QgsXmlUtils.writeVariant(prop, doc)
prop2 = QgsXmlUtils.readVariant(elem)
self.assertEqual(prop, prop2)
prop = QgsProperty.fromField('oid')
elem = QgsXmlUtils.writeVariant(prop, doc)
prop2 = QgsXmlUtils.readVariant(elem)
self.assertEqual(prop, prop2)
示例4: testLinkedColorButton
def testLinkedColorButton(self):
definition = QgsPropertyDefinition('test', 'test', QgsPropertyDefinition.ColorWithAlpha)
button = QgsPropertyOverrideButton()
button.init(0, QgsProperty(), definition)
cb = QgsColorButton()
button.registerLinkedWidget(cb)
project_scheme = [s for s in QgsApplication.colorSchemeRegistry().schemes() if isinstance(s, QgsProjectColorScheme)][0]
project_scheme.setColors([[QColor(255, 0, 0), 'col1'], [QColor(0, 255, 0), 'col2']])
button.setToProperty(QgsProperty.fromValue('#ff0000'))
self.assertTrue(cb.isEnabled())
self.assertFalse(cb.linkedProjectColorName())
button.setActive(False)
self.assertTrue(cb.isEnabled())
self.assertFalse(cb.linkedProjectColorName())
button.setToProperty(QgsProperty.fromExpression('project_color(\'Cthulhu\'s delight\')'))
self.assertTrue(cb.isEnabled())
self.assertFalse(cb.linkedProjectColorName())
button.setToProperty(QgsProperty.fromExpression('project_color(\'col1\')'))
self.assertTrue(cb.isEnabled())
self.assertEqual(cb.linkedProjectColorName(), 'col1')
button.setActive(False)
self.assertTrue(cb.isEnabled())
self.assertFalse(cb.linkedProjectColorName())
button.setActive(True)
self.assertTrue(cb.isEnabled())
self.assertEqual(cb.linkedProjectColorName(), 'col1')
示例5: getParamValues
def getParamValues(self):
if self.mUpdateExistingGroupBox.isChecked():
fieldName = self.mExistingFieldComboBox.currentText()
else:
fieldName = self.mOutputFieldNameLineEdit.text()
layer = self.cmbInputLayer.currentLayer()
context = dataobjects.createContext()
parameters = {}
parameters['INPUT'] = layer
parameters['FIELD_NAME'] = fieldName
parameters['FIELD_TYPE'] = self.mOutputFieldTypeComboBox.currentIndex()
parameters['FIELD_LENGTH'] = self.mOutputFieldWidthSpinBox.value()
parameters['FIELD_PRECISION'] = self.mOutputFieldPrecisionSpinBox.value()
parameters['NEW_FIELD'] = self.mNewFieldGroupBox.isChecked()
parameters['FORMULA'] = self.builder.expressionText()
output = QgsProcessingOutputLayerDefinition()
if self.leOutputFile.text().strip():
output.sink = QgsProperty.fromValue(self.leOutputFile.text().strip())
else:
output.sink = QgsProperty.fromValue('memory:')
output.destinationProject = context.project()
parameters['OUTPUT'] = output
ok, msg = self.alg.checkParameterValues(parameters, context)
if not ok:
QMessageBox.warning(
self, self.tr('Unable to execute algorithm'), msg)
return {}
return parameters
示例6: getConsoleCommands
def getConsoleCommands(self, parameters, context, feedback):
arguments = []
arguments.append('-resolution')
arguments.append(self.RESOLUTION_OPTIONS[self.parameterAsEnum(parameters, self.RESOLUTION, context)])
if self.parameterAsBool(parameters, buildvrt.SEPARATE, context):
arguments.append('-separate')
if self.parameterAsBool(parameters, buildvrt.PROJ_DIFFERENCE, context):
arguments.append('-allow_projection_difference')
# Always write input files to a text file in case there are many of them and the
# length of the command will be longer then allowed in command prompt
listFile = os.path.join(QgsProcessingUtils.tempFolder(), 'buildvrtInputFiles.txt')
with open(listFile, 'w') as f:
layers = []
for l in self.parameterAsLayerList(parameters, self.INPUT, context):
layers.append(l.source())
f.write('\n'.join(layers))
arguments.append('-input_file_list')
arguments.append(listFile)
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
# Ideally the file extensions should be limited to just .vrt but I'm not sure how
# to do it simply so instead a check is performed.
_, ext = os.path.splitext(out)
if not ext.lower() == '.vrt':
out = out[:-len(ext)] + '.vrt'
if isinstance(parameters[self.OUTPUT], QgsProcessingOutputLayerDefinition):
output_def = QgsProcessingOutputLayerDefinition(parameters[self.OUTPUT])
output_def.sink = QgsProperty.fromValue(out)
self.setOutputValue(self.OUTPUT, output_def)
else:
self.setOutputValue(self.OUTPUT, out)
arguments.append(out)
return ['gdalbuildvrt', GdalUtils.escapeAndJoin(arguments)]
示例7: testRenderMarkerLayerDataDefined
def testRenderMarkerLayerDataDefined(self):
""" test that rendering a marker symbol with data defined enabled layer works"""
points_shp = os.path.join(TEST_DATA_DIR, 'points.shp')
points_layer = QgsVectorLayer(points_shp, 'Points', 'ogr')
QgsProject.instance().addMapLayer(points_layer)
layer = QgsSimpleMarkerSymbolLayer()
layer.setDataDefinedProperty(QgsSymbolLayer.PropertyLayerEnabled, QgsProperty.fromExpression("Class='Biplane'"))
layer.setColor(QColor(100, 150, 150))
layer.setSize(5)
layer.setStrokeStyle(Qt.NoPen)
symbol = QgsMarkerSymbol()
symbol.changeSymbolLayer(0, layer)
points_layer.setRenderer(QgsSingleSymbolRenderer(symbol))
ms = QgsMapSettings()
ms.setOutputSize(QSize(400, 400))
ms.setOutputDpi(96)
ms.setExtent(QgsRectangle(-133, 22, -70, 52))
ms.setLayers([points_layer])
renderchecker = QgsMultiRenderChecker()
renderchecker.setMapSettings(ms)
renderchecker.setControlPathPrefix('symbol_layer')
renderchecker.setControlName('expected_markerlayer_ddenabled')
self.assertTrue(renderchecker.runTest('markerlayer_ddenabled'))
QgsProject.instance().removeMapLayer(points_layer)
示例8: testProjectColor
def testProjectColor(self):
scheme = [s for s in QgsApplication.colorSchemeRegistry().schemes() if isinstance(s, QgsProjectColorScheme)][0]
scheme.setColors([])
definition = QgsPropertyDefinition('test', 'test', QgsPropertyDefinition.ColorWithAlpha)
button = QgsPropertyOverrideButton()
button.init(0, QgsProperty(), definition)
button.aboutToShowMenu()
self.assertIn('Project Color', [a.text() for a in button.menu().actions()])
self.assertIn('Color', [a.text() for a in button.menu().actions()])
color_action = [a for a in button.menu().actions() if a.text() == 'Color'][0]
self.assertEqual([a.text() for a in color_action.menu().actions()][0], 'No colors set')
# add some project colors
scheme.setColors([[QColor(255, 0, 0), 'color 1'], [QColor(255, 255, 0), 'burnt marigold']])
button.aboutToShowMenu()
self.assertIn('Project Color', [a.text() for a in button.menu().actions()])
self.assertIn('Color', [a.text() for a in button.menu().actions()])
color_action = [a for a in button.menu().actions() if a.text() == 'Color'][0]
self.assertEqual([a.text() for a in color_action.menu().actions()], ['color 1', 'burnt marigold'])
button.menuActionTriggered(color_action.menu().actions()[1])
self.assertTrue(button.toProperty().isActive())
self.assertEqual(button.toProperty().asExpression(), 'project_color(\'burnt marigold\')')
button.menuActionTriggered(color_action.menu().actions()[0])
self.assertTrue(button.toProperty().isActive())
self.assertEqual(button.toProperty().asExpression(), 'project_color(\'color 1\')')
button.setToProperty(QgsProperty.fromExpression('project_color(\'burnt marigold\')'))
button.aboutToShowMenu()
color_action = [a for a in button.menu().actions() if a.text() == 'Color'][0]
self.assertTrue(color_action.isChecked())
self.assertEqual([a.isChecked() for a in color_action.menu().actions()], [False, True])
# should also see color menu for ColorNoAlpha properties
definition = QgsPropertyDefinition('test', 'test', QgsPropertyDefinition.ColorNoAlpha)
button = QgsPropertyOverrideButton()
button.init(0, QgsProperty(), definition)
button.aboutToShowMenu()
self.assertIn('Project Color', [a.text() for a in button.menu().actions()])
self.assertIn('Color', [a.text() for a in button.menu().actions()])
# but no color menu for other types
definition = QgsPropertyDefinition('test', 'test', QgsPropertyDefinition.Double)
button = QgsPropertyOverrideButton()
button.init(0, QgsProperty(), definition)
button.aboutToShowMenu()
self.assertNotIn('Project Color', [a.text() for a in button.menu().actions()])
self.assertNotIn('Color', [a.text() for a in button.menu().actions()])
示例9: testDataDefinedSize
def testDataDefinedSize(self):
p = QgsProject()
l = QgsLayout(p)
collection = l.pageCollection()
# add some pages
page = QgsLayoutItemPage(l)
page.setPageSize('A4')
collection.addPage(page)
page2 = QgsLayoutItemPage(l)
page2.setPageSize('A5')
collection.addPage(page2)
page3 = QgsLayoutItemPage(l)
page3.setPageSize('A5')
collection.addPage(page3)
self.assertEqual(page.pos().x(), 0)
self.assertEqual(page.pos().y(), 0)
self.assertEqual(page2.pos().x(), 0)
self.assertEqual(page2.pos().y(), 307)
self.assertEqual(page3.pos().x(), 0)
self.assertEqual(page3.pos().y(), 527)
page.dataDefinedProperties().setProperty(QgsLayoutObject.ItemHeight, QgsProperty.fromExpression('50*3'))
page.refresh()
collection.reflow()
self.assertEqual(page.pos().x(), 0)
self.assertEqual(page.pos().y(), 0)
self.assertEqual(page2.pos().x(), 0)
self.assertEqual(page2.pos().y(), 160)
self.assertEqual(page3.pos().x(), 0)
self.assertEqual(page3.pos().y(), 380)
page2.dataDefinedProperties().setProperty(QgsLayoutObject.ItemHeight, QgsProperty.fromExpression('50-20'))
page2.refresh()
collection.reflow()
self.assertEqual(page.pos().x(), 0)
self.assertEqual(page.pos().y(), 0)
self.assertEqual(page2.pos().x(), 0)
self.assertEqual(page2.pos().y(), 160)
self.assertEqual(page3.pos().x(), 0)
self.assertEqual(page3.pos().y(), 200)
示例10: testDataDefinedBackgroundColor
def testDataDefinedBackgroundColor(self):
layout = QgsLayout(QgsProject.instance())
item = QgsLayoutItemMap(layout)
item.setBackgroundColor(QColor(255, 0, 0))
self.assertEqual(item.backgroundColor(), QColor(255, 0, 0))
self.assertEqual(item.brush().color().name(), QColor(255, 0, 0).name())
item.dataDefinedProperties().setProperty(QgsLayoutObject.BackgroundColor, QgsProperty.fromExpression("'blue'"))
item.refreshDataDefinedProperty()
self.assertEqual(item.backgroundColor(), QColor(255, 0, 0)) # should not change
self.assertEqual(item.brush().color().name(), QColor(0, 0, 255).name())
示例11: testContainsAdvancedEffectsAndRasterization
def testContainsAdvancedEffectsAndRasterization(self):
layout = QgsLayout(QgsProject.instance())
item = QgsLayoutItemLabel(layout)
self.assertFalse(item.containsAdvancedEffects())
# item opacity requires that the individual item be flattened to a raster item
item.setItemOpacity(0.5)
self.assertTrue(item.containsAdvancedEffects())
# but not the WHOLE layout
self.assertFalse(item.requiresRasterization())
item.dataDefinedProperties().setProperty(QgsLayoutObject.Opacity, QgsProperty.fromExpression('100'))
item.refresh()
self.assertFalse(item.containsAdvancedEffects())
self.assertFalse(item.requiresRasterization())
item.dataDefinedProperties().setProperty(QgsLayoutObject.Opacity, QgsProperty())
item.refresh()
self.assertTrue(item.containsAdvancedEffects())
self.assertFalse(item.requiresRasterization())
item.setItemOpacity(1.0)
self.assertFalse(item.containsAdvancedEffects())
self.assertFalse(item.requiresRasterization())
# item blend mode is NOT an advanced effect -- rather it requires that the WHOLE layout be rasterized to achieve
item.setBlendMode(QPainter.CompositionMode_DestinationAtop)
self.assertFalse(item.containsAdvancedEffects())
self.assertTrue(item.requiresRasterization())
map = QgsLayoutItemMap(layout)
# map items are different -- because they override paint, they don't get the auto-flattening and rasterization
map.setItemOpacity(0.5)
self.assertFalse(map.containsAdvancedEffects())
# rather, a map with opacity requires the WHOLE layout to be rasterized
self.assertTrue(map.requiresRasterization())
map.dataDefinedProperties().setProperty(QgsLayoutObject.Opacity, QgsProperty.fromExpression('100'))
map.refresh()
self.assertFalse(map.containsAdvancedEffects())
self.assertTrue(map.requiresRasterization())
示例12: add_mask_filter
def add_mask_filter(layer):
if not isinstance(layer, QgsVectorLayer):
return False
# check if a layer has already a mask filter enabled
if layer.labeling() is None:
return False
try:
expr = "%s(%d)" % (SPATIAL_FILTER, layer.crs().postgisSrid())
prop = QgsProperty()
prop.setExpressionString(expr)
# new settings
settings = QgsPalLayerSettings(layer.labeling().settings())
settings.dataDefinedProperties().setProperty(QgsPalLayerSettings.Show, prop)
if isinstance(layer.labeling(), QgsVectorLayerSimpleLabeling):
layer.setLabeling(QgsVectorLayerSimpleLabeling(settings))
except Exception as e:
for m in e.args:
QgsMessageLog.logMessage(m, 'Extensions')
示例13: testDataDefinedFrameColor
def testDataDefinedFrameColor(self):
layout = QgsLayout(QgsProject.instance())
item = QgsLayoutItemMap(layout)
item.setFrameEnabled(True)
item.setFrameStrokeColor(QColor(255, 0, 0))
self.assertEqual(item.frameStrokeColor(), QColor(255, 0, 0))
self.assertEqual(item.pen().color().name(), QColor(255, 0, 0).name())
item.dataDefinedProperties().setProperty(QgsLayoutObject.FrameColor, QgsProperty.fromExpression("'blue'"))
item.refreshDataDefinedProperty()
self.assertEqual(item.frameStrokeColor(), QColor(255, 0, 0)) # should not change
self.assertEqual(item.pen().color().name(), QColor(0, 0, 255).name())
示例14: testDataDefinedTitle
def testDataDefinedTitle(self):
layout = QgsLayout(QgsProject.instance())
layout.initializeDefaults()
legend = QgsLayoutItemLegend(layout)
layout.addLayoutItem(legend)
legend.setTitle('original')
self.assertEqual(legend.title(), 'original')
self.assertEqual(legend.legendSettings().title(), 'original')
legend.dataDefinedProperties().setProperty(QgsLayoutObject.LegendTitle, QgsProperty.fromExpression("'new'"))
legend.refreshDataDefinedProperty()
self.assertEqual(legend.title(), 'original')
self.assertEqual(legend.legendSettings().title(), 'new')
示例15: testDataDefinedTitle
def testDataDefinedTitle(self):
mapSettings = QgsMapSettings() # NOQA
composition = QgsComposition(QgsProject.instance())
composition.setPaperSize(297, 210)
legend = QgsComposerLegend(composition)
composition.addComposerLegend(legend)
legend.setTitle('original')
self.assertEqual(legend.title(), 'original')
self.assertEqual(legend.legendSettings().title(), 'original')
legend.dataDefinedProperties().setProperty(QgsComposerObject.LegendTitle, QgsProperty.fromExpression("'new'"))
legend.refreshDataDefinedProperty()
self.assertEqual(legend.title(), 'original')
self.assertEqual(legend.legendSettings().title(), 'new')